Improvement in window-shade rollers



J'. R. SMYTH.

WINDOW-SHADE ROLLERS.

No. 192,663. I Patented July 3,1877.

I NPETERS. FHOTO-LITHOGRAPHER WASHINGTON D c JAMES R. SMYTH, OF NEWYoRK, N. Y.

IMPROVEMENT IN WlNDO W-SHADE ROLLERS.

Specification forming part of Letters Patent No. 192,663, dated July 3,1877 application filed November 14, 1876.

To all whom it may concern:

Be it known that 1, JAMES R. SMYTH, of New York city, county, and Stateof New York, have invented new and useful Improvements in Attachments toWindow-Shade Rollers and I hereby declare that thefollowing is a clearand exact description ofthe construction and operation of the same,reference be ing had to the annexed drawings, making a part of thisspecification, and to the letters and figures of reference markedthereon.

The object of my invention is to provide for a self-adjustable extensionattachment to the commonly-used window-shade rollers, to which the shadeis fastened by aid of nails or otherwise.

By the aid of my improved attachment the roller is automatically madeshorter or longer, as may be required, the roller being cut somewhatshorter than the distance between the hearings or journals fastened tothe inner sides of the window-frame; but no very exact measure, isrequired to be taken of the length of the roller, as the attachmentmakes up for all deficiency in the accuracy in the measurmg.

My invention consists in devices as described and claimed.

I construct a metallic cylinder which will fit the roller in such amanner that it will readily slide over the end of the same; or theroller at the end may be reduced in size to somewhat less than the boreof the cylinder. To the end of this cylinder, which is provided with alongitudinal slot, is fastened the sheave for the shade-cord, and insidethe cylinder is placed a spiral spring. The cylinder is perforated atthe end near to the sheave with two rows of holes, for the purpose offastening the shade to the metallic cylindenby aid of a threaded needle.This cylinder is placed over the end of the roller, and is held to thecylinder by aid of a screw or nail, which is inserted in theforementioned slot and screwed or driven into the roller, near to theend of the same.

It will readily be understood that the spiral spring inside the cylinderpressing against the side of the sheave, attached to the cylinder andagainst the end of the roller, forces the sheave with its axle againstthe journal or bearing fastened to the window-frame, and thus preventsthe roller from becoming accidentally detached from its bearings.

Referring to the drawings, Figure 1 is a side view of my improvedshade-roller attachment. Fig. 2 is a longitudinal sectional view of thesame.

A is the shade-roller. B is the cylinder, with slot 0 and the two rowsof holes at d. D is the spiral spring. E is the sheave. F is the screwor nail.

I am aware that a patent was granted to D. H. Chamberlain, August 21,1855, No. 13,481, for a similar purpose, but differently constructed;and I therefore do not Wishto be understood as claiming, broadly, anadjustable sleeve at the end of a shade-roller but,

What I desire to claim is The cylindrical sleeve B, having slot 0 andholes (1 cl, and carrying at its end the sheave E, in combination withthe spring D, and the shade-roller A, having the screw or nail F,substantially as described, and for the purpose set forth.

JAMES R. SMYTH.

